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Baf2 windows

Product Details

Baf2 windows product

Excellent Transmission from 200nm - 12μm

Resistant to High-Energy Radiation

Provide High Transmission without AR Coatings

Barium Fluoride (BaF2) Windows can be used in a variety of applications, such as infrared spectroscopy, due to their wide broadband transmission that extends from the deep ultraviolet to the long-wave infrared. Barium fluoride’s low index of refraction of 1.48 provides high transmission without the need for anti-reflection coatings. Barium fluoride windows can be used up to 800°C in a dry environment, but prolonged exposure to moisture can degrade transmission in the vacuum ultraviolet range. While barium fluoride windows are less resistant to water than calcium fluoride, BaF2 windows are the most resistant optical fluoride to high-energy radiation, but feature lower UV transmittance. BaF2 has a Knoop hardness of 82.





Dimension tolerance


Surface quality (scratch & dig)

20/10 or better

Clear aperture

>85%, >90%

Surface accuracy





0.1~0.3mm x 45 degree


AR or Custom

We can manufacture optical windows in any optical material required. Please contact us with your specific requirements.

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Contact Us
  • D09-320-321, SISP, Shenben Str., Hunnan Dist., Shenyang 110179, China
  • +86-199 0981 7122
  • +86-199 0981 7122
  • yibeiteoptics@gmail.com
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